Electric heater



Nov. 25, 1924- v 1,516,657

I H. A; ZIOLA ELECTRIC HEATER Filed Fe 27, 1929 2 Sheets- Sheet 1 Nov. 25, 4- 1,516,657

H. A. ZIOLA ELECTRIC HEATER Filed Feb. 27 1 2 2 Shaina-Sheet 2 n m I w. m m 29 2/ /Q 28 Patented Nov. 25, 1924.

mama! A. zrons, or cmvnnann, onro, Assm'noa,

PATENT-7 oar-"Ice.

swan'rzaauen MANUFACTURING COMPANY, or ronnno, OHIO. v k v ELECTRIC HEATER.

Application me February 27, 1922. Serial No. 539,895. I I

To all whom it may concern:

Be it known that I, HENRY A. ZIOLA, a subject of thev Government of Poland, residing at Cleveland, in the county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Electric Heaters, specification.

This invention relates to electric heaters;

of the type known as hot plates, comprising a stand on which an electric heating element is supported, the stand having a top upon wh1c cooking vemels can rest while they are being heated. I a

The object of theinvention is to provide improvements with res e'ct tovarious fear. tures of the article, suc asthe posts which hold the heating element in' place; the method of securing the porcelain insulator through which thecurrent wires are led toconnection with the heatin element; the means for assembling the %e base and top plate of the heater, an 0t er particulars as will morefully appear from the followin description.

In the accompanyingdrawings, Fig. 1 is a to 'plan view ofthe device. Fig.2 is a si e elevation. Fig. 3 is a vertical cross section. Fig. 4 is a plan of the heating element.

Fig. 5 is a detail in section: showing the manner of constructing and attaching the le Fig. 6 is an enlarged detail of the insu ator. r

The construction of the device is such that its main parts may be made of pressed sheet metal, which is desirable forreasons of cheapness, these parts being assembled in a novel'manner as described below.

In the drawings, 6 indicates a base or bot-- tom plate, the outline of which corres onds to the shape desired, being circular ass own,

and this bottom plate has a depending Thelegs 8 are madeof sheet metal, and areflange 7 extending around its edge.

mainly convex in horizontal to give the requisiterigidity, of each leg being bent under and inwardly to form a foot 9 witha circular boss 10, so that the feet'will not mar a table or the like. At each edge each leg has formed thereon an inwardly projecting shoulder 11 which terminates in an u wardly rojecting tongue 12, and the ottom p ate 6 is supported on these shoulders, the flange 7 thereof fitting in the space between cross section,

of which the following is a i in various 1 the lower end I the leg and the tongues 12 and resting at its lower edge against the shoulders 11. The tongues 12 extend through slots in the plate and the projecting endsare then upset or bentv down on the top of the plate 6, as indicated at 13. This fastens the plate and legs together and forms a rigid structure.

At the upper end of each leg it is provided with a pair of horizontal inwardly projectingarms or fingers 14 disposed at opposite sides. of an upwardly proificting' vertical extension orfinger 15, and t s extension-has a small boss 16 ressed thereon. The-fingers 14 and 15 there y form an angular seat for the support of an asbestos plate 17, which su ports the heatin ele ment. This plate 1? rests upon the gers 14 and fits snugly against the fingers 15, being preferably notched at the edge, as indicated at 18, so that the fingers 15 fit within said notches;

The heating element consistsof a coiled wire 19 which is fixed at its opposite ends to binding posts 20 which extend through the asbestos plate 17, and between its ends the coiled wire is bent around posts 21,

arranged to form ahig-zag. Each of these posts 21 has a head 22, a groove 23, a base flange 2 and a stem 25,the wire coil being bent around in the groove 23 whereby it is held in lace. The flange24 rests on top of theas estos late 17 and the stem 25 or tends throught e same, and the lower end of thestem ,is riveted or. upset as indicated at 26 over a washer 27 The posts are thereby firmly fixed to the asbestos plate, which serves to prevent radiation of beat downwardly and also forms an insulation.

The to plateis indicated at 28. This is stampe to inverted dish formation, with numerous openings in the top, and the articles to be heated are placed thereon. The depending flange 29 0 the top late has a shoulderBO which rests on the as late 17 and holds the same in place, an the flange itself fits closely around the edge of said plate and encloses the u right fingers 15, and a snap joint is formed between the flange of the top plate and said fingers by slittin the flange as indicated at 31, and the metal etween the slits is pressed in as indicated at 32 a suflicient distance to snap under the bosses 16 when the top plate 18 forced down into position, the bars 32 yield- BY mnsmt assmnmmrrs, TO ran ing to permit the bosses to pass. The to plate can be removed by wedgmg a blace under its ed or otherwise springin the same upwar y to pass the bosses. A l the parts are thus assembled and held together without the use of rivets or screws.

The current wires 38 are connected to the binding posts 20 under the asbestos plate, and to a pair of posts 34 mounted on an insulating plug 35 which has holes 36 through which extend the current wires 37 leading from a suitable plu and connected to the posts 34. The insu ating plug 35 is set n a hole in the bottom plate 6, and around this hole said plate is provided with several-inwardly projecting tongues 38. The block 35 has a groove 39 around the same.- Before the parts are assembled, the tongues 38 are bent or set up suiliciently to allow the block to be placed in the hole. Then the tongues 38 are sprung into the groove 39, and the block 35 is then forced in with pressure, causing the tongues to bend back to original position and to project into and engage in the groove 39, whereby the block is fastened in position in the plate. The groove is of such slight depth that the tongues when pressed in firmly engage against the block, and the latter is thereby held without the necessity for other fastening devices.

The invention is not limited to the particular form shown, but various changes may be made within the scope of the following claims.

claim:

'1. In an electric heater, a top plate, a

bottom plate having a depending flange and adjacent apertures, and legs having upwardly projecting spaced tongues passin throu h the apertures of said plate an roviding a supporting seat for said flange in abutting enga ement with the legs, t e upper portion 0 said legs being a apted to interlock with the top plate.

2. An electric heater comprising a bottom plate having a depending flange and slits adjacent said flange, legs having shoulders on which sai flanges rest and flexible tongues extending through said slits and bent down upon the bottom late, a heating element supported on the egs above the bottom pla'te,.and a top plate mounted on the legs above the heating element.

3. n electric heater comprising a bottom plate having a depending flange around its edge, sheet metal legs bent to convex cross section and having projecting shoulders at their opposite edges on which the flange of the bottom plate rests, said bottom late having slits adjacent said flan an the le having tongues extending t rough said slits and bent down upon the bottom plate, a heating element supported on the legs above the bottom late, and a top plate extending over the eating element.

4. An electric heater comprising, legs having horizontal fingers pro ectin inwardly at their upper ends and vertical gers projecting. upwardly ad'acent said fingers, an insulating plate resting on the horizontal fingers and fitting between the vertical fingers, a heating element mounted on the insulating plate, and a top plate having a depending flange fitting around the ed of the insulating plate and havirag a yie ding engagement with the vertical ngers.

5. An electric heater comprising legs having horizontal and verticalfingers at their upper edge, an insulating slate resting upon the horizontal fingers an fitting between the vertical fingers, a heating element mounted on the insulating plate, and a top plate having a shoulder resting upon the insulating late and a depending flange fitting around t e edge of the insulating p ate and having a snap engagement with the vertical fingers.

6. An electric heater comprising le having vertical fingers at their upper on provided with bosses, an insulating plate supported on said legs and fitting between said fingers, a heating element carried by the insulating plate, and a top plate havin a depending flange fitting around the e go of the insulating plate and spring bars engageable under said bosses.

7. In an electric heater, an insulating plate, a plurality of posts mounted thereon, each post being grooved and having a stem extending through the late, and a resistance wire'bent back an forth around said posts and engaged in the grooves thereof.

8. In an electric heater, a late of insulating material, a plurality 0 cats mounted thereon, said posts havin eads at the top, grooves below said hea s, and flanges below the grooves, said flanges resting on the plate, and also having stems extending through the plate and fastened thereunder and a resistance element extending around said posts.

9. In an electric heater the combination with a plate having a hole therein and tongues at the edge of said hole, of an insulating block fitting in the hole and having a groove into which said tongues are pressed to hold the block in position on the plate, said block having 0 nings through the same for electrical con uctors.

10- In an electric heater the combination of a plate having a hole through the same and spaced tongues around said hole, the ends of the tongues projecting slightly beyond the edge of the hole, and an insulating block pressed in said hole and having a groove in which said tongues are engaged to hold the block in osition.

11. In an electric eater, a top plate, a bottom plate having a dependin flange and adjacent apertures, and legs ving upwardly projecting spaced tongues psssin In testimony whereof I afiix my signature throu h the apertures of sa' plate an in presence oftwo witnesses. provi ing a. supporting seat in abutting enagement with the legs for said flange, the HENRY ZIOLA' i ower end of said, legs being bent laterally Witnesses:

and provided with a circular bearing boss Jon A. Bonmnm', upon its under face. Bnesm F. Ponmx. 

